WMS7201050P Digital Potentiometer Equivalent & Substitute Parts

Part Overview

The WMS7201050P is a digital potentiometer manufactured by Nuvoton Technology Corporation, designed for data acquisition applications. This 50kΩ, 256-tap device features an SPI interface and operates across a 2.7V to 5.5V supply range in an 8-PDIP package. The product is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

WMS7201050P

Nuvoton Technology CorporationIn Stock: 1210WMS7201050P Datasheet

Current PartRFQ

MCP41050-I/P

Microchip TechnologyIn Stock: 1587MCP41050-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the WMS7201050P is determined by the following critical parameters:

• Resistance Value: 50kΩ (exact match required)
• Number of Taps: 256 (exact match required)
• Interface Protocol: SPI (exact match required)
• Number of Circuits: 1 (exact match required)
• Supply Voltage Range: 2.7V ~ 5.5V (minimum overlap required)
• Operating Temperature Range: -40°C ~ 85°C (minimum coverage required)
• Package Type: 8-DIP (0.300", 7.62mm) (exact match required)
• Mounting Type: Through Hole (exact match required)

The MCP41050-I/P from Microchip Technology meets all critical substitution criteria, providing functional equivalence for the obsolete WMS7201050P in applications requiring a 50kΩ, 256-tap SPI-controlled digital potentiometer in an 8-PDIP through-hole package.

Parameter Comparison

Engineering Selection Recommendations

The MCP41050-I/P is the primary substitute for the obsolete WMS7201050P. Selection of this alternative is supported by:

• Product Availability: The MCP41050-I/P maintains active product status with current manufacturing support, whereas the WMS7201050P is obsolete.
• Regulatory Compliance: The MCP41050-I/P is ROHS3 compliant, meeting current environmental and regulatory requirements. The WMS7201050P is RoHS non-compliant.
• Functional Equivalence: Both devices share identical core specifications for resistance value, tap count, interface protocol, supply voltage range, operating temperature, and package configuration.

Design engineers should note the following parameter differences when implementing the MCP41050-I/P as a replacement:

• The MCP41050-I/P features volatile memory, whereas the WMS7201050P provides non-volatile storage. Applications requiring power-loss retention of potentiometer settings must implement external storage or initialization routines.
• The MCP41050-I/P exhibits a higher tolerance specification (±30% versus ±20%) and temperature coefficient (800ppm/°C versus 500ppm/°C), which may impact precision-critical applications.
• Wiper resistance differs between devices (175Ω typical for MCP41050-I/P versus 80Ω for WMS7201050P), affecting circuit impedance calculations.

Frequently Asked Questions (FAQ)

Q: Can the MCP41050-I/P directly replace the WMS7201050P without PCB modifications?

A: Yes. Both devices are packaged in 8-DIP (0.300", 7.62mm) through-hole format with identical pin configurations for SPI interface operation. No PCB layout changes are required for mechanical and electrical compatibility.

Q: What is the primary functional difference between these devices?

A: The WMS7201050P incorporates non-volatile memory to retain potentiometer settings after power loss, while the MCP41050-I/P uses volatile memory and requires re-initialization after power cycling. Application firmware must account for this difference.

Q: Are there tolerance or performance implications when substituting the MCP41050-I/P?

A: The MCP41050-I/P has a wider tolerance specification (±30% versus ±20%) and higher temperature coefficient (800ppm/°C versus 500ppm/°C). Applications with strict precision requirements should evaluate whether these specifications remain acceptable for the intended use case.

Q: Does the MCP41050-I/P meet current regulatory requirements?

A: Yes. The MCP41050-I/P is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. The obsolete WMS7201050P does not meet these requirements.

Q: Are there any supply chain advantages to using the MCP41050-I/P?

A: Yes. The MCP41050-I/P maintains active product status with established manufacturing and distribution channels. The WMS7201050P is obsolete and subject to limited availability and potential end-of-life discontinuation.